Vibrator



Dec. 20, 1938. ,'E. J. MAsTNEY 2,140,807

VIBRATOR original Filed oet. '17, 193e jfl/wbr Zdzyard JMS/gy Vinclusive within that section.

.dented Dec. 20, 1938y UNITED STATES PATENT' OFFICE vnma'roa Edward J. Mastney, Berwyn, Ill., assignor to Oak Manufacturing Company, Chicago, Ill., a cofporation of Illinois Application October l1'1, 1936, Serial No. 106,186 Renewed April 11, 1938 5 Claims.

A for a vibrator which will retain the vibrator in resilient fashion and thoroughly sealv it against the transmission of noise from the inside to the outside, and the ingress of dirt and moisture. An additional object is to devise a mounting whereby the entirevibrator unit may be readily removed like a tube.

Referring to the drawing:

Figure 1 is a sectional elevation on line I-I of Figure 2.

Figure 2 is a bottom view of the vibrator.

Figure 3 is a sectional view of the mounting.

Figure 4 is a similar sectional View at right angles to Figure 3 taken along line 4-4 of Figure 3.

Figure 5 is a top view with a part thereof cut away of the rubber mounting.

Figure 6 is a bottom view of the rubber mounting.

Figure '7 is a modification of the mounting to accommodate a' different size can.

The vibrator'proper comprises a frame I of magnetic material bent to form arms 2 and 3 and a bight 4. A magnetizing coil 5 is mounted on a pole piece 6 at bight 4. Between the free ends of arms 2 and 3 a stack 8 is bolted by bolts 9. This stack as is well known, comprises alternate strips of metal and insulating material, and includes a pair of members I and II, supporting fixed contacts I2 and I3. The stack also includes a reed I having an armature I6 at the free end thereof adapted to cooperate with pole face I1 of pole piece 6.- Reed I5 carries movable contacts I8 and I9 adapted to cooperate with the fixed contacts. A driving contact carried on va separate spring 2 I cooperates with a fixed contact 22 carried by arm 2. The connections are such that when coil 5 is energized, driving contact 20 causes armature I6 to be oscillated in front of pole face I1, and alternately make and break the contacts on each side of the reed.

The vibrator is supported by a sponge rubber member 25, having a top section 26 and a bottom section 21. It will be noted that top section 26 is smaller than section 21. The top ilat face 28 of member is provided with a rectangular slot 28 into which certain projecting portions of the stack depend. Slot 28 extends down into top section 26, and gives access to four pockets 30 to 33 It will be noted (Cl. Zoll- 90) that the pockets are formed in opposed pairs transverse to the slot, and are separated by a pair of tongues 34 and 35.

Bottom section 21 vhas the inner portion thereof hollowed out to form a circular chamber 36. This chamber extends upwardly into section 21 far enough to leave a wall 31 as a separating partition between this chamber and the pockets in the upper portion of the rubber member. Integral with wall 21 and depending therefrom are a plurality of small tubular members 38.

As previously pointed out certain portions of the stack extend into the rubber pockets, such portions being membersv I0 and II carrying the .stationary contacts and reed I5. In addition, in-

terve'ning insulators 40 and 4I also extend down into the pockets to prevent any loose wires from coming into contact with each other. Members III and I I have their free ends 42 and 43 bent outwardly to extend into the pockets and have soldered thereto suitable lead wires. These wires are forced through the sponge rubber inwall 31 and are threaded through certain o! the tubular members 38. The same procedure is had with reed I5 and its lead.

'Ihe bottom portion 21 of the member has a thin ilange 45 extending outwardly therefrom for mounting purposes. `The rubber member 25 is disposed on a vacuum tube type of base, comprising a rigid insulating disc 46, carrying a plurality of prongs 41. Insulating disc 46 is preferably of the same diameter as flange 45. A metal clamp ring 41 having a cross section of a rectangular Z is disposed around disc 46 with one of the arms 48 of the Z 41 resting on the top of ilange 45, and the other arm 49 of the Z extending outwardly from the edge of the insulating disc y46, and flush with the bottom thereof.

A can 58 having asponge rubber liner 5I is disposed over the entire vibrator. This liner 5I has the inside edge tapering outwardly at 52 near the open end thereof to leave a thin edge 53 at the open end thereof. Can 50 is so proportioned that its edge 54 rests on portion 49 of the clamp ring 41, while edge 53 of the liner is pressed down around the vertical part 55 of clamp ring 41. Thus the rubber liner is pressed downwardly against the bottom portion 49 of the clamp ring 41 to form a tight seal. A cover 58 of metal is adapted to fit around the open end of can 50. This cover is provided with suitable apertures to clear prongs 41 and rests snugly against the bottom of insulating disc 46. For grounding purposes, one of the prongs such as prong 50, may be tted tightly to cover 58. Preferably cap 5l is soldered to can 50, forming a sealed' construction. It is understood, of course, that this solder may be applied at several spots, such as point 80.

In order to utilize various sizes of cans demanded by various manufacturers, the construction shown in Figure 7 may be utilized. Here, the clamp ring comprises a top portion 65 and a vertical portion 66 and a bottom horizontal porlLA tion S'i. This bottom portion. 6i may be of any extent and is riveted to cup S8 by means of rivets 68. The bottom portion 'Hi oi cover 88 is disposed tightly against insulating disc 46 as before, and the prongs lli clear the metal as above. Can lli, suitably dimensioned to iit cover 68 is provided, and within this can is a suitable rubber liner- 'i2 whose thickness is somewhat greater than the distance between portion 6G of the clamp ring and the inside of cover 66. When the can is forced down into position, the sponge rubber is pressed and forced into the space between the clamp ring and the cover in a manner corresponding to that shown Figures 3 and 4.

What is claimed is follows:

l. A vibrator comprising an elongated magnetizahle frame, a reed rigidly supported at one end of said frame and adapted to vibrate transversely thereof, a magnetizing coil et the opposite end of said frame, contacts carried by said frame and reed, connections whereby said reed is vib-rated upon energizing oi the r`ircuit, and means for mounting said vibrator at one end thereof, said means comprising a rubber mounting member having a slot in one f ace thereof into which the mounted end oi the vibrator projects, leads for said vibrator contacts threaded through said rubber member, said rubber member having a flange around the bottom thereof and extending outwardly therefrom, a rigid insulating disc having a plurality of contact making prongs mounted therein disposed below said rubber member, said disc and flange having substantially corresponding edges, a rigid retaining ring around the edges of said disc and flange, said ring having a portion overlying said flange and another portion extending parallel to the plane of said disc, a metal cover tting the bottom of said disc and having apertures for clearing said prongs and a side portion extending upwardly away from said prongs and around said rubber member, a can for covering said vibrator with the open end disposed within said cover, and means for retaining said ring in position while said can is over said vibrator.

2. The structure of claim l wherein said ring has the portion parallel to the disc extending outwardly therefrom and flush with the bottom of said disc, and wherein the very edge of said can bears down upon said outwardly extending .portion of said ring to retain the same in position.

3. The structure of claim 1 wherein said ring has the bottom portion parallel to the disc extending outwardly therefrom and flush with the bottom of said disc, and wherein the free edge of said can engages said bottom portion to retain the same in position, and wherein a resilient liner is provided for said can, said liner having a portion adapted to be pressed tightly down against the outside of said ring and over the outwardly extending portion thereoi'.

4. The structure of claim l wherein said mounting member has the bottom thereof hollowed out to leave a plurality of downwardly depending short tubes through which the lead Wires are threaded.

5. The structure of claim l wherein said rubber member has a plurality of transverse pockets extending from the slot therein into which certain portions of the vibrator extend for mounting.

EDWARD J. MASTNEY.

Cil 

